C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 5/00 (2006.01) C09K 5/08 (2006.01)
Patent
CA 2210902
Disclosed is a cold transfer medium for use in a refrigeration system having separate circuits for a refrigerant and the cold transfer medium. The cold transfer medium is an aqueous solution of a lower alcohol with the addition of (1) a low molecular weight polycarboxylic acid, (2) an ester or salt of sorbic acid, (3) a polyhydric alcohol, (4) an aliphatic acid or a salt of an aliphatic acid, (5) an anionic surfactant and/or (6) a sulfur-free triazole compound. Also disclosed is such an aqueous solution containing finely divided silica as a sedimentation inhibitor.
On divulgue un milieu de transfert du froid pour utilisation dans un système de réfrigération ayant des circuits séparés pour le réfrigérant et le milieu de transfert du froid. Le milieu de transfert du froid est une solution aqueuse d'un alcool inférieur additionnée (1) d'un acide polycarboxylique de faible poids moléculaire, (2) d'un ester ou d'un sel de l'acide sorbique, (3) d'un polyalcool, (4) d'un acide aliphatique ou d'un sel d'un acide aliphatique, (5) d'un surfactant anionique et/ou (6) d'un composé de triazole sans soufre. On divulgue également une solution aqueuse contenant de la silice finement divisée comme inhibiteur de sédimentation.
Degussa-Huls Aktiengesellschaft
Fetherstonhaugh & Co.
Huls Aktiengesellschaft
LandOfFree
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